Navigon 2510 Explorer EU 23. Form factor: Handheld. Map view options: 2D, 3D. Display diagonal: 88.9 mm (3.5 "), Aspect ratio: 4:3. Processor clock speed: 500 MHz, Built-in processor: SiRFatlasIV. Weight: 0.122 kg, Width: 96.5 mm, Depth: 14.5 mm